fix return value of gc() and breakpoint() These need to return void (undefined), and not themselves (which is what happens if SET_RVAL() is not called, due to spidermonkey reusing the slot for arguments.callee)
fix return value of gc() and breakpoint() These need to return void (undefined), and not themselves (which is what happens if SET_RVAL() is not called, due to spidermonkey reusing the slot for arguments.callee)

mtwebster/cjs,pixunil/cjs,pixunil/cjs,mtwebster/cjs,pixunil/cjs,pixunil/cjs,mtwebster/cjs,mtwebster/cjs,pixunil/cjs,mtwebster/cjs